Introduction
4
SBVU048 – March 2019
Copyright © 2019, Texas Instruments Incorporated
TPS7A78EVM-011 Evaluation module
2
Introduction
Texas Instruments' TPS7A78EVM-011 helps design engineers evaluate the operation and performance of
the TPS7A78 smart linear voltage regulator for possible use in their own circuit application. This particular
EVM is intended for evaluation purposes and is not intended to be an end product. The EVM configuration
contains a single 3.3-V output regulator optimized for e-metering applications. The TPS7A78EVM-011
regulates V
AC
supply to 3.3-V DC supply and can source up to 27 mA (max) current.
The EVM also features a power-fail detection signal and a power-good indication signal to warrant a V
AC
supply failure and to indicate to a microcontroller (MCU) that the regulated DC voltage is greater than 90%
of the targeted regulation DC voltage.
2.1
Before You Begin
This evaluation module is not encapsulated and has exposed terminals with voltages that are connected
to the main AC supply; the following warnings are noted for the safety of anyone using or working close to
the TPS7A78EVM-011. Observe all safety precautions.
WARNING
Failure to adhere to these steps or to not heed the safety
requirements at each step may lead to shock, injury, and damage
to the hardware. Texas Instruments is not responsible or liable in
any way for shock, injury, or damage caused by negligence or
failure to heed advice. If you are not trained in the proper safety of
handling and testing power electronics please do not test this
evaluation module.
WARNING
Danger: HIGH VOLTAGE! This evaluation board is intended for
professional use only. This board has exposed high voltages. Do
not operate this board without proper high-voltage/high-current
safety practices. Read this user guide carefully before testing with
TPS7A78EVM-011. Use floating measurement equipment such as
high-voltage differential scope probes and see
and
for proper EVM setup and test equipment connection.
